Desiccating apparatus.



o. PAUCKSGH.

lDESIGGAFIITG: APPARATUS.

APPLICATION FILED JULY 18,1908

924,271. Patented June 8, 1909.

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l Tg1 O. PAUCKSOH.

. DBSIGGATING APPARATUS.

APPLICATION FILED JULY 18. 1908.

A T TOF/MFM? Patented June 8, 1909.

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` Muff/ww? 0550 .PQ zc/bacia O PAUCKSCH-- DESIGCATING APPARATUS.

l APPLICATION FILED JULY 18, 1908. gglts n Patented June 8, 1909.

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DDDEIDUDDCIDD l 0; PAUGKSGH. DESIGGATING APPRIUS APPLIGATION FILED JULY18,-190.

924,271 Patented June 8, 1909.

6 SHEETS-SHEET 4.

4 Trop/vins 0. PAUGKSCH. DBSICCATING APPARATUS.

APPLICATION` FILED JULY 18,1908.

Patented June 8, 1909.

6 SHEETS-SHEET 5.

0. PAUCKSCH.

DESICCATING APPARATUS. APPLIUATION FILED JUL`Y1a,19o8.

924,271 Patented June 8,-1909.

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Specification of Letters Patent.

Patented .rune e, 1909.

Application filed July 18, 1908. Serial No. 444,234.

To all whomit may concern:

Be it known that I, T'ro PAUCKsCl-i, a subject of the King of Prussia, residing at Berlin, in the Kingdom of Prussia and German Empire, have invented new and useful Improvements in Desiccating Apparatus and the Like, of which the following is a specification. f

My invention relates to improvements in machines for drying potatoes, cereals and all other materials of the kind and in particular to that class of machines which are provided with a box, casing or the like underneath two heated drums, said box or casing having the object, to prevent the steainevolvedrby the action of the hot drums on.the moist material passed between them from escaping, and to draw olf this steam, so that it will not come into contact with the dried material. tion, means are provided to expose the material passed between the drums, While itis still adhering to the circumference of said drums and before it leaves said box to hot and dry air. This air enters through pipes near, or at the top of the box and is drawn o, together with the steam, through a suction pipe at the bottom of the box. By the action of this hot air all moisture is removed from the external surface ofthe material, which is in contact With the steam evolved,

and the drying effect is consequently much.

increased.

In carrying out the invention it is .not necessary that ythe box extend underv the whole length of the drums, as said box'can also be constructed in several. divisions with perforated side wallsand the hot air can be lown through a perforated pipe against the material adhering to the drums. This air will also be removed, together with the team, by the suction in the. divisions of 'the ox. i

In the accompanying drawing showing' my invention by way of eXa-mplez--Flgure' l is a cross section on the line AB of Fig. 2; Fig. 2 is a side elevation of the machine shown in Fig. l, the Scrapers used in practice t'o remove the dried material from the drums not being shown, in order to avoid complication. Fig. 3 represents another construction, in which the box underneath the hot drums is divided into two divisions connected together by aperforated pipe'. Fig. 4 is a section on line C--D of Fig. 3 looking to the right. Fig. 5 is a cross section of Fig.

According to my present inven-4 3 on the line E, F but looking toward the right, a portion of the wheel f being shown as perforated. Fig. 6 isan end'elevation, Fig. 71 a longitudinal section of a boiler showing a. pipe coil in the flue for heating the air lto be conducted into the box underneath thehot drums, and Fig. 8 shows diagralnmatically how the drying apparatus and air heating apparatus are connected together.

The drums a and a1 are preferably heated by steam of about l5()O C., which is introduced through the hollow hubs a2, a3, while the water. formed'by the condensation of said steam is drawn off through the pipe a* (Fig. 2) which passes through the hub at the opposite end, as shown at a5. Said drums a, a1' are rotated by a pulley al, or the like, connected with the hub a2, the rotation of the one drum being transferred by spurwheels a7 and 0LB to thc other drum a1.

The material to be dried is introduced between the drums a and a1 at the top, and is. carried, by reason of its adherence to the slowly rotating drums, through the box or casing c u to the knives or Scrapers b, bj, b vwhich 1t is removed, falling down along tlie plates b2, b3 into asuitable receiver underneath the machine. The box c, which incloses the bottomv half of each of the drums a, a1, is provided with openings l at -the top, through which hot air is conducted.

Said air, which is heated, for example, by being drawn through a coil z' provided in the tlue of a boiler l, passes between the outer surface of the drums and the Wall of ,said box to the middle, being there kept in contact with said drums by the plates e. At each end ofthe box there is a wall f, which prevents thehot air introduced at al from escaping at the sides, and enables it to` be drawn off through the suction pipe L connected to the bottom of said box. ln order -to prevent the coil z' from being destroyed by the heat when the vdryin Inachine is not in operation the'cock i1 1n the pipe 2 leading to the opening Lis closed and the cock i is opened whereupon atmospheric air continuously lcirculates through the coil z'.

The air entering at d into the box c has a higher temperature than the material to bc dried at the hottest part and is in most cases between 120-130 C. The temperature of the air yentering the box can be regulated by opening or closing the valve WL, as by'so l'so doing more or less atmospheric air is drawn in through the socket n, Which is mixed withthe hot air coming from the coil z'. By means of the valve o the passage of the hot air tothe box `@can be cut otf or regulated.

p is a thermometer by which the tem perature of the het air can be read 0H.

In the construction shown in Figs. 3-5 in which the casing c of Fig. l is divided into two divisions c1 and c2, the inner side walls f are perforated and said divisions are connected by a pipe g, which is so pertorated that the hot air entering said pipe at l is blown against the material adhering to the drum, said air and the .steam developed being` drawn of through the perforated side walls f into the box divisions c1, c2, to which the suction pipe h is connected.

the steam dome t ot' the boiler Z, a cock s2 being interposed.

What I claim and desire to secure by Letters vPatent of the United States is l. A drying apparatus, comprisingl in combination, two drums arranged beside and approximately in contact with each efe-e271 hot air pipes at the upper part of said box,

and a suction `pipe at the bottom o t said hor.

substantially as, and for the purpose set forth.

2. A drying apparatus, comprising in combination, two drums arranged beside and approximately in Contact with eaeh other and adapted io be rotated. a bozt inelosing the lower portions only oit.' said drums, an apparatus for heating,T air` means tor introdueing the air thus heated directly into said box and means 'for drawing oitl' the hot air and the steam evolved in drying, suhstantially as and Vfor the purpose set forth.

3. A drying apparatus, comprising in combination, two drums arranged beside and approximately in Contact 'with each other and adapted to be rotated, a box inclosing the lower portions ot' said drums, means to introduce hotair around the lower part of said drums, and means to draw ell the het air and steam evolved in drying, substantially as, and for the purpose set forth.

In testimony whereof l' have signed my naine to this specification in the presence oi two subscribing witnesses.

, @TTU Pili Uttll. lVitnesses HENRY llasrnii, vVoLnniuAn llaur'r. 

